Trolley.



PATENTED DEC. 29, 1903.

W. J. ROWLEY.

TROLLEY.

APPLICATION FILED MAY 7, 1903.

N0 MODEL.

oams wmgns co. novziumq. WASH UNITED STATES Patented December 29, 1903.

PATENT OFFICE.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 748,422, dated December29, 1903.

' Application filed May 7, 1903. $erial No. 156,095. (No model.)

To aZZ whom it may concern:

Be it known that I, WALTER J. RowLEY, a citizen of the United States ofAmerica, re-

siding at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inTrolleys, of which the following is a specification, reference being hadtherein tothe accompanying drawings.

This invention relates to certain new and useful improvements introlleys, and has for its main object to provide novel and effectivemeans for preventing the trolley-wheel from becoming accidentallydisengaged from the trolley-wire.

Briefly described, the invention comprises aharp, which is provided withtwo verticallydisposed arms extending above the trolleywheel that isjournaled in the harp, and in the upper end of each of these verticalarms is pivoted a dog, which dogs act as guards to retain the wheel inengagement with the wire, the guards being held in normal position bymeans of springs carried by the arms and engaging the dogs.

In describing the invention in detail reference will be had to theaccompanying drawings, forming a part of this application and whereinlike numerals of reference will'be employed for designating like partsthroughout the different views of the drawings, in which- Figure l is aside elevation of a trolley constructed in accordance with my invention,the trolley-pole broken away. Fig. 2 is a rear elevation of the same;and Fig. 3 isa top plan view, the harp and trolley-wheel being partlybroken away.

In the accompanying drawings, 1 indicates the prongs of the harp, whichlatter is suitably attached to the trolley-pole 2. Between the prongs ofthe harp on the axle or shaft 3 V is mounted the ordinary trolley-wheel4.

Each prong carries an upwardly-extending vertically disposed arm 5, inwhich, near its upper end, is a transverse slot 6, and pivotally mountedin these slots of the verticallydisposed arms-are guards 7, which areen-- gaged by and are under the tension of springs 8, attached to therear face of the verticallydisposed arms 5.

The spring-pressed guards 7 extend beyond tically-disposed arms 5 inalinement with the.

guards 7, whereby when a downward pull is made on the cord or rope 10the guards 7 will be spread in order to permit the placing of thetroiley-wheel into engagement with the wire or the removal of the saidwheel from the wire. I may also employ eyes 12 near the lower end of theharp through which the cords 9 are passed in order that the pull againstthe eyes 11 may not be so direct as if the cords hung down vertically.

When the guards come into engagement with a switch or hanger, the samewill readily spread apart, so as to permit the passage of the trolley,and as soon as said switch or hanger has been passed the springs willreturn the guards to their normal position, whereby to preventaccidental disengagement of the trolley-wheel from the wire. The sidewalls of the slots 6 may be made curved, as seen by dotted lines in Fig.3, whereby to give sufficient movement to the guards when they areactuated.

While I have herein shown and described the invention in detail as it ispracticed by me, yetit will be evident that various changes may be madein the details of construction 'Without departing from the generalspirit of my invention.

Having fully described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-- In a trolley, the combination with theharp each prong of which carries a vertically-disposed arm provided nearits upper end with a transverse slot, of guards pivoted in said slots,springs connected to the vertical arms and engaging said guards, andcords connected to said guards for actuating the same, as and for thepurpose described.

In testimony whereof I affix my signature in the presence of twowitnesses.

- WALTER J. ROWLEY. WVitnesses:

H. O. EVERT,

E. E. POTTER.

